Method for manufacturing a sandwich construction with highly resilient conductive cores and resulting sandwich construction

Abstract

A sandwich panel with conductive cores (10,12) interposed between layers (14,16,18) of foam insulating material, particularly of polyurethane, supporting elements (22) provided with at least one pin (26) for connection to the cores, particularly lamps (24) supplied with electrical energy by these cores connected to a source of current, characterized in that the insulating foam material has an elasticity threshold at least equal to the maximum pressure exerted by one of the pins of an element (22) inserted in the foam.

What is claimed is: 
     
       1. A sandwich panel comprising: conductive layers interposed between layers of insulating foam;   supporting elements provided with at least one pin for connection to said conductive layers;   said supporting elements being supplied with electrical energy by said conductive layers connected to a source of current; and   wherein the insulating foam has an elasticity threshold at least equal to the maximum pressure exerted by one of the pins of an element inserted in said insulating foam.   
     
     
       2. The sandwich panel according to claim 1, wherein the insulating foam is polyurethane, and the elements are lamps. 
     
     
       3. The sandwich panel according to claim 1, further comprising at least one sheet of material having elastic recovery properties interposed between the insulating foam and each conductive layer, at least on the far side of the conductive layer in the direction of introduction of the pin of the element. 
     
     
       4. The sandwich panel according to claim 3, wherein a sheet of material having elastic recovery properties is interposed between the insulating foam and each surface of each conductive layer. 
     
     
       5. The sandwich panel according to claim 3, wherein the sheet of material having elastic recovery properties is integrated and produced with the insulating foam. 
     
     
       6. The sandwich panel according to claim 5, wherein the sheet of material having elastic recovery properties, integrated and produced with the insulating foam, is a layer of balls of elastomer embedded in the upper layer of the insulating foam, facing the conductive layer. 
     
     
       7. The sandwich panel according to claim 3, wherein the sheet of material having elastic recovery properties is a layer of glue serving to integrate the conductive layer and the insulating foam. 
     
     
       8. The sandwich panel according to claim 3, wherein the conductive layer comprises a multi-sheet assembly of material having elastic return properties and conductive material. 
     
     
       9. The sandwich panel according to claim 3, wherein the conductive layer is a conductively loaded foam. 
     
     
       10. The sandwich panel according to claim 3, wherein at least one of the sheet of material having elastic recovery properties and the insulating foam is loaded with material having three-dimensional expansion properties under the influence of a temperature increase.